Display device and method for manufacturing the same

ABSTRACT

Provided is a display device. The display device includes a first substrate including a first base layer, a circuit layer disposed on the first base layer, and a light emitting layer disposed on the circuit layer, a second substrate including a top surface and a bottom surface and in which a plurality of grooves arranged in a first direction are defined in the bottom surface, the second substrate being disposed on the first substrate, and a plurality of light blocking members disposed on the plurality of grooves to control propagation direction of light outputted from the light emitting layer.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a divisional application of U.S. patent applicationSer. No. 15/623,128 filed on Jun. 14, 2017, which claims priority under35 U.S.C. § 119 of Korean Patent Application No. 10-2016-0083655 filedon Jul. 1, 2016, the entire contents of which are hereby incorporated byreference.

BACKGROUND

The present disclosure herein relates to a display device, and moreparticularly, to a display device and a method for manufacturing thesame.

Various display devices such as smart phones, notebook computers, andsmart televisions are being developed. Among them, in recent years,display devices mounted on vehicles are being utilized in variousfields. For example, display devices for vehicles may receive realtraffic information and Internet information to provide the receivedinformation to a user. Also, display devices for vehicles may provideservices such as music, games, TV programs, and movies.

As described above, since various information and services are providedto the user through display devices for the vehicles, demands fordisplay devices for vehicles are showing a rising trend.

However, in the use of such a display device for a vehicle, an imagedisplayed from the display device may be seen on a windshield of thevehicle. This windshield display may be problematic because when theuser drives a vehicle, the image may obstruct the user's field ofvision.

SUMMARY

The present disclosure provides a display device in which light isemitted in a direction facing a display surface and a method formanufacturing the same.

An embodiment of the inventive concept provides a display deviceincludes: a first substrate including a first base layer, a circuitlayer disposed on the first base layer, and a light emitting layerdisposed on the circuit layer; a second substrate including a topsurface and a bottom surface and in which a plurality of groovesarranged in a first are defined in the bottom surface, the secondsubstrate being disposed on the first substrate; and a plurality oflight blocking members disposed on the plurality of grooves to controlpropagation direction of light outputted from the light emitting layer.

In an embodiment, the second substrate may include: a second base layerin which the plurality of grooves are defined; and a protection layerdisposed on the second base layer to cover the plurality of grooves.

In an embodiment, the first substrate includes a display area and anon-display area that surround the display area, a plurality of emissionareas and a plurality of non-emission areas that are adjacent to theplurality of emission areas may be defined on the display area, and theplurality of grooves may overlap the display area and not overlap thenon-display area.

In an embodiment, one of the plurality of grooves crosses at least twoadjacent emission areas among the plurality of emission areas.

In an embodiment, the display device may further include a sealingmember configured to couple the first substrate to the second substrate,wherein the sealing member may overlap the non-display area.

In an embodiment, the display device may further include a touch sensingunit disposed on the second base layer.

In an embodiment, each of the plurality of grooves may have a first sidesurface, a second side surface, and a bottom surface configured toconnect the first and second side surfaces to each other, and the firstside surface and the second side surface may be parallel to a thicknessdirection of the second substrate.

In an embodiment, each of the plurality of grooves may have a width ofabout 5 micro meters to about 20 micro meters in the first direction anda depth of about 100 micro meters to about 500 micro meters in thethickness direction.

In an embodiment, the plurality of grooves are arranged with a uniformdistance therebetween, from the distance being between about 30 micrometers to about 150 micro meters.

In an embodiment, each of the plurality of grooves may have a first sidesurface, a second side surface, and a bottom surface configured toconnect the first and second side surfaces to each other, and the firstside surface and the second side surface may be inclined at apredetermined angle from a thickness direction of the second substrateto a direction that is parallel to the bottom surface.

In an embodiment, the light blocking member may include a black resin.

In an embodiment of the inventive concept, a display device includes: adisplay panel on which a display area and a non-display area configuredto surround the display area are defined; a window member including atop surface and a bottom surface and in which a plurality of groovesarranged in a first direction are defined in the bottom surface, thewindow member being disposed on the display panel to allow the bottomsurface to face the display panel; and a light blocking member disposedin each of the plurality of grooves, wherein the plurality of groovesare disposed in the display area.

In an embodiment, the window member may include: a base layer on whichthe top surface and the bottom surface are defined; and a bezel layeroverlapping the non-display area and disposed on the bottom surface.

In an embodiment, a plurality of emission areas and a plurality ofnon-emission areas that are adjacent to the plurality of emission areasmay be defined on the display area, and the plurality of grooves are inthe display area and outside the non-display area.

In an embodiment, the display device may further include a touch sensingunit disposed between the display panel and the window member, whereinthe window member may include a protection layer disposed on the bottomsurface to cover the plurality of grooves.

In an embodiment of the inventive concept, a method for manufacturing adisplay device includes: preparing a lower substrate including a firstbase layer, a circuit layer disposed on the first base layer, and alight emitting layer disposed on the circuit layer; preparing an uppersubstrate including a plurality of grooves formed in a bottom surface ofthe upper substrate, arranged in a first direction and a light blockingmember disposed in the grooves; and disposing the upper substrate on thelower substrate.

In an embodiment, a display area and a non-display area may be definedon the lower substrate, and the method may further include coupling thebottom surface of the upper substrate to the lower substrate by using asealing member overlapping the non-display area.

In an embodiment, the method may further include disposing a touchsensing unit on the upper substrate.

In an embodiment, the method may further include disposing anencapsulation substrate on the lower substrate; and coupling theencapsulation substrate to the upper substrate by using an adhesionlayer.

In an embodiment, the method may further include disposing a touchsensing unit on the encapsulation substrate, wherein the upper substratemay be disposed on the touch sensing unit.

BRIEF DESCRIPTION OF THE FIGURES

The accompanying drawings are included to provide a furtherunderstanding of the inventive concept, and are incorporated in andconstitute a part of this specification. The drawings illustrateexemplary embodiments of the inventive concept and, together with thedescription, serve to explain principles of the inventive concept. Inthe drawings:

FIG. 1 is an exploded perspective view of a display device according toan embodiment of the inventive concept;

FIG. 2A is a block diagram of the display apparatus according to anembodiment of the inventive concept;

FIG. 2B is an equivalent circuit view of a pixel of FIG. 2A;

FIG. 3A is a plan view of a display panel of FIG. 1;

FIG. 3B is a partial plan view of the display panel of FIG. 3A;

FIG. 4 is a cross-sectional view taken along line I-I′ of FIG. 3A;

FIGS. 5A and 5B are enlarged views of an area AA of FIG. 4;

FIG. 6 is a partial cross-sectional view of the display panel in which atraveling direction of light outputted from an emission area of FIG. 4is illustrated;

FIGS. 7A and 7B are cross-sectional views taken along line I-I′ of FIG.3A according to another embodiment of the inventive concept;

FIG. 8 is a cross-sectional view taken along line I-I′ of FIG. 3Aaccording to another embodiment of the inventive concept;

FIGS. 9A and 9B are enlarged views of an area BB of FIG. 8;

FIG. 10 is a partial cross-sectional view of a display panel of FIG. 8;

FIG. 11 is an exploded perspective view of a display device according toanother embodiment of the inventive concept;

FIG. 12 is a cross-sectional view of a touch sensing unit according toan embodiment of the inventive concept;

FIGS. 13A and 13B are plan views of the touch sensing unit according toan embodiment of the inventive concept;

FIG. 13C is a partial enlarged plan view of an area CC of FIG. 13B;

FIG. 13D is a cross-sectional view taken along line II-II′ of FIG. 13C;

FIG. 14A is an exploded perspective view of a display device accordingto another embodiment of the inventive concept;

FIG. 14B is a cross-sectional view taken along line III-III′ of FIG. 14;

FIGS. 15A, 15B, 15C, 15D, and 15E are views illustrating a method formanufacturing a display device according to another embodiment of theinventive concept; and

FIG. 16 is a view illustrating an example of the display deviceaccording to an embodiment of the inventive concept.

DETAILED DESCRIPTION

Hereinafter, embodiments of the inventive concept will be described withreference to the accompanying drawings. In this specification, it willalso be understood that when one component (or region, layer, portion)is referred to as being ‘on’, ‘connected to’, or ‘coupled to’ anothercomponent, it can be directly disposed/connected/coupled on/to the onecomponent, or an intervening third component may also be present.

Like reference numerals refer to like elements throughout. Also, in thefigures, the thickness, ratio, and dimensions of components areexaggerated for clarity of illustration. The term “and/or” includes anyand all combinations of one or more of the associated listed items.

It will be understood that although the terms of first and second areused herein to describe various elements, these elements should not belimited by these terms. The terms are only used to distinguish onecomponent from other components. For example, a first element referredto as a first element in one embodiment can be referred to as a secondelement in another embodiment without departing from the scope of theappended claims. The terms of a singular form may include plural formsunless referred to the contrary.

Also, “under”, “below”, “above”, “upper”, and the like are used forexplaining relation association of components illustrated in thedrawings. The terms may be a relative concept and described based ondirections expressed in the drawings.

The meaning of ‘include’ or ‘comprise’ specifies a property, a fixednumber, a step, an operation, an element, a component or a combinationthereof, but does not exclude other properties, fixed numbers, steps,operations, elements, components or combinations thereof.

FIG. 1 is an exploded perspective view of a display device according toan embodiment of the inventive concept. FIG. 2A is a block diagram ofthe display apparatus according to an embodiment of the inventiveconcept. FIG. 2B is an equivalent circuit view of a pixel of FIG. 2A.

According to an embodiment of the inventive concept, a display device DDof FIG. 1 may be applied to tablet PCs, smart phones, personal digitalassistants (PDAs), portable multimedia players (PMPs), game consoles,watches, electronic devices, and the like. Also, the display device DDmay be applied to electronic equipment such as televisions or externalbillboards as well as small and middle electronic equipment such aspersonal computers, notebook computers, navigation units for vehicles,and cameras.

Particularly, the display device DD according to an embodiment of theinventive concept may be mounted in transport means such as vehicles,airplanes, and ships. The above-described equipment are exemplified asmerely an exemplary embodiment, and thus, the display device DD may beadopted for other electronic equipment unless departing from the spiritand scope of the disclosed concept.

The display device DD includes a plurality of areas divided on a displaysurface. Here, the display surface may be one surface of the displaydevice on which an image is directly seen by a user. The display deviceDD includes a display area DA on which an image is displayed and anon-display area NDA that is adjacent to the display area DA. Thenon-display area NDA may surround the display area DA.

Referring to FIG. 1, the display device DD may include a window memberWM, a display panel DP, and an accommodating member BC.

The window member WM may be disposed above the display panel DP totransmit an image provided from the display panel DP through the displayarea DA. For example, the window member may include glass, sapphire,plastic, and the like.

As illustrated in FIG. 1, although the window member WM is illustratedas a single layer, the window member WM may include a plurality oflayers. For example, the window member WM may include a base layer andat least one bezel layer disposed on a bottom surface of the base layerto correspond to the non-display area NDA.

The display panel DP is parallel to a surface that is defined by a firstdirection DR1 and a second direction DR2. A normal direction of thedisplay panel DP is indicated in a third direction DR3. The thirddirection DR3 indicates a thickness direction of the display device DD.A top surface (a front surface) and a bottom surface (a rear surface) ofeach of the members are divided by the third direction DR3. However,directions indicated as the directions DR1, DR2, and DR3 may be arelative concept and the exact direction may vary.

In detail, the display panel DP may include a first substrate 100 and asecond substrate 200 disposed between the window member WM and the firstsubstrate 100.

The first substrate 100 may include a plurality of pixels, a pluralityof organic light emitting devices, and a plurality of signal lines thatare required for driving the display device DD. For example, the signallines include a plurality of gate lines extending in the seconddirection DR2 and arranged in the first direction DR1. For example, thesignal lines may include a plurality of data lines extending in thefirst direction DR1 and arranged in the second direction DR2. The gatelines and the data lines may be insulated from each other and cross eachother.

However, the technical ideas of the inventive concept are not limited towhat is explicitly disclosed. For example, the gate lines may extend inthe first direction DR1 and be arranged in the second direction DR2.Also, the data lines may extend in the second direction DR2 and bearranged in the first direction DR1.

The second substrate 200 is disposed on the first substrate 100 to sealorganic light emitting devices contained in the first substrate 100against the outside. For example, the second substrate 200 may be anencapsulation substrate.

According to an embodiment of the inventive concept, a plurality ofgrooves arranged in the first direction and extending in the thirddirection perpendicular to the first direction may be defined in abottom surface of the second substrate 200. Here, the bottom surface ofthe second substrate 200 may be a surface facing the first substrate100.

Also, a light blocking member may be disposed in each of the pluralityof grooves. For example, the light blocking member may be a resin havinga black color, but is not limited thereto. The light blocking member maybe formed of a material having various colors for blocking the travelingof light. The traveling direction of the light provided from the firstsubstrate 100 may be controlled by the grooves defined in the bottomsurface of the substrate 200. This will be described in more detail withreference to FIG. 4.

According to an embodiment of the inventive concept, the display panelDP may be a liquid crystal display panel, an organic light emittingdisplay panel, an electrophoretic display panel, or an electrowettingdisplay panel. Here, the embodiment of the inventive concept is notlimited to a kind of display panels. Hereinafter, in the descriptions ofthe inventive concept, the organic light emitting display panel will bedescribed as an example.

The accommodating member BC is coupled to the window member WM toaccommodate the display panel DP. The accommodating member BC may beformed by assembling a plurality of parts or include one body that isinjection-molded. The accommodating member BC may include plastic or ametal. The accommodating member BC may include a bottom part FR in whichthe display panel DP is accommodated and a plurality of sidewalls SDthat are bent from the bottom part FR.

Although the display device DD is flat in FIG. 1, the display device DDaccording to an embodiment of the inventive concept may be flexible.That is, each of components such as the display panel DP and the windowmember WM of the display device DD may be formed of a flexible materialand thus be bendable, stretchable, or compressible.

Referring to FIGS. 2A and 2B, a block diagram of the display device DDaccording to an embodiment of the inventive concept is illustrated. Thedisplay device DD includes a signal control unit TC, a gate driving unitGC, a data driving unit DC, and an organic light emitting display panelDP (hereinafter, referred to as a display panel).

The signal control unit SC receives input image signals and outputsimage data IDATA that are converted to match an operation mode of thedisplay panel DP, a gate control signal SCS, and a data control signalDCS.

The gate driving unit GC receives the gate control signal SCS from thesignal control unit SC. The gate driving unit GC receiving the gatecontrol signal SCS generates a plurality of gate signals. The gatedriving unit GC successively supplies the gate signals to the displaypanel DP.

The data driving unit DC receives the data control signal DCS and theconverted image data IDATA from the signal control unit SC. The datadriving unit DC generates a plurality of data signals on the basis ofthe data control signal DCS and the converted image data IDATA. The datadriving unit DC supplies data signals to the display panel DP.

The display panel DP receives an electrical signal from the outside todisplay an image. The display panel DP includes a plurality of gatelines SL1 to SLn, a plurality of data lines DL1 to DLm, and a pluralityof pixels PX11 to PXnm.

The gate lines SL1 to SLn extend in the second direction DR2 and arearranged in the first direction DR1 crossing the second direction DR2.The gate lines SL1 to SLn successively supply gate signals from the gatedriving unit GC.

The data lines DL1 to DLm are insulated from the gate lines SL1 to SLnand cross the gate lines SL1 to SLn. The data lines DL1 to DLm extend inthe first direction DR1 and are arranged in the second direction DR2.The data lines DL1 to DLm receive data signals from the data drivingunit DC.

The display panel DP receives a first power source voltage ELVDD and asecond power source voltage ELVSS from the outside. Each of the pixelsPX11 to PXnm is turned on in response to a corresponding gate signal ofthe gate signals. Each of the pixels PX11 to PXnm receives the firstpower source voltage ELVDD and the second power source voltage ELVSS togenerate light in response to a corresponding data signal of the datasignals. The first power source voltage ELVDD may have a level higherthan that of the second power source voltage ELVSS. The pixels PX11 toPXnm may be arranged in the form of a matrix. The pixels PX11 to PXnmare connected to corresponding gate lines of the gate lines SL1 to SLnand corresponding data lines of the data lines DL1 to DLm.

Each of the pixels PX11 to PXnm receives a gate signal from acorresponding gate line of the gate lines SL1 to SLn and a data signalfrom a corresponding data line of the data lines DL1 to DLm. Each of thepixels PX11 to PXnm may be turned on in response to a corresponding gatesignal to generate light in response to a corresponding data signal,thereby displaying an image.

Also, each of the pixels PX11 to PXnm according to an embodiment of theinventive concept includes at least one transistor, at least onecapacitor, and an organic light emitting device. FIG. 2B illustrates anequivalent circuit view illustrating an example of a pixel PXijconnected to an i-th gate line SLi of the plurality of gate lines SL1 toSLn and a j-th data line of the plurality of data lines DL1 to DLm.

The pixel PXij includes a first thin film transistor TFT1, a second thinfilm transistor TFT2, a capacitor Cap, and an organic light emittingdevice OLEDij. The first thin film transistor TFT1 includes a controlelectrode connected to the i-th gate line SLi, an input electrodeconnected to the j-th data line DLj, and an output electrode. The firstthin film transistor TFT1 outputs a data signal applied to the j-th dataline DLj in response to the gate signal applied to the i-th gate lineSLi.

The capacitor Cap includes a first capacitor electrode connected to thefirst thin film transistor TFT1 and a second capacitor electrodereceiving a first power source voltage ELVDD. The capacitor Cap chargeselectrical charges by an amount corresponding to a difference between avoltage corresponding the data signal received from the first thin filmtransistor TFT1 and the first power source voltage ELVDD.

The second thin film transistor TFT2 includes a control electrodeconnected to the output electrode of the first thin film transistor TFT1and the first capacitor electrode of the capacitor Cap, an inputelectrode receiving the first power source voltage ELVDD, and an outputelectrode. The output electrode of the second thin film transistor TFT2is connected to the organic light emitting device OLEDij.

The second transistor TFT2 controls driving current flowing through theorganic light emitting diode OLEDij to correspond to a charge amountstored in the capacitor Cap. A turn-on time of the second thin filmtransistor TFT2 is determined according to the amount of charge in thecapacitor Cap. Substantially, the output electrode of the second thinfilm transistor TFT2 supplies a voltage having a level less than that ofthe first power source voltage ELVDD to the organic light emittingdevice OLEDij.

The organic light emitting device OLEDij includes a first electrodeconnected to the second thin film transistor TFT2 and a second electrodereceiving the second power source voltage ELVSS. The organic lightemitting device OLEDij may include a light emitting pattern disposedbetween the first and second electrodes.

The organic light emitting device OLEDij emits light in the turn-onperiod of the second thin film transistor TFT2. The light generated inthe organic light emitting device OLEDij may have a color that isdetermined by a material for forming the light emitting pattern. Forexample, the light generated in the organic light emitting device OLEDijmay have one of a red color, a green color, a blue color, and a whitecolor.

FIG. 3A is a plan view of the display panel of FIG. 1. FIG. 3B is apartial plan view of the display panel of FIG. 3A.

Referring to FIG. 3A, the display panel DP may include a display areaDP-DA and a non-display area DP-NDA on a plane. The display area DP-DAand the non-display area DP-NDA may be changed according to astructure/design of the display panel DP.

As described above, the display panel DP includes a first substrate 100and a second substrate 200. The first substrate 100 includes a pluralityof pixels PX overlapping the display area DP-DA. Although the pixels PXarranged in the form of a matrix is illustrated, the embodiment of theinventive concept is not limited thereto. The pixels PX may be arrangedin the form of a non-matrix, e.g., the form of a pantile.

Referring to FIG. 3B, the display area DP-DA is defined as a pluralityof emission area EA-R, EA-G, and EA-B and a non-emission area NEA on aplane that is defined by the first direction DR1 and the seconddirection DR2. FIG. 3 illustrates an example of thee types of emissionareas EA-R, EA-G, and EA-B that are arranged in the form of the matrix.Organic light emitting devices that emit light having three colorsdifferent from each other may be disposed on the three types of emissionareas EA-R, EA-G, and EA-B, respectively.

According to another embodiment of the inventive concept, organic lightemitting devices emitting white colors may be disposed on the threetypes of emission areas EA-R, EA-G, and EA-B, respectively. Here, threetypes of color filters having colors different from each other mayoverlap the three types of emission areas EA-R, EA-G, and EA-B,respectively.

According to the descriptions of the inventive concept, a feature inwhich “light having a predetermined color is emitted from the emissionarea” may include a case in which light generated in the light emittingdevice is emitted as it is as well as a case in which light generated inthe corresponding light emitting device is converted in color and thenemitted.

Although not shown, according to another embodiment of the inventiveconcept, the plurality of emission areas EA-R, EA-G, and EA-B mayinclude four or more types of emission areas.

The non-emission area NEA may be divided into first non-emission areasNEA-1 surrounding the emission areas EA-R, EA-G, and EA-B and a secondnon-emission area NEA-2 defining a boundary between the firstnon-emission areas NEA-1. A driving circuit of the pixel, e.g., the thinfilm transistors TFT1 and TFT2 (see FIG. 2B) or the capacitor Cap (seeFIG. 2B) may be disposed on each of the first non-emission areas NEA-1.Signal lines, e.g., the gate lines SLi (see FIG. 2B) and the data lineDLj (see FIG. 2B) may be disposed on the second non-emission area NEA-2.However, the embodiment of the inventive concept is not limited thereto.For example, the first non-emission areas NEA-1 and the secondnon-emission area NPXA-2 may not be divided with respect to each other.

Also, although not shown, according to another embodiment of theinventive concept, each of the emission areas EA-R, EA-G, and EA-B mayhave a shape similar to a diamond-shape. According to an embodiment ofthe inventive concept, the organic light emitting devices that emitlight having the four colors different from each other may be disposedon the four types of emission areas that are repeatedly disposed,respectively.

According to an embodiment of the inventive concept, a plurality oflight blocking members BR arranged in the first direction DR1 andextending in the second direction DR2 perpendicular to the firstdirection DR1 may be disposed on the display panel DP. The lightblocking members BR may be disposed in a plurality of grooves defined ina bottom surface DS of the second substrate 200. The light blockingmembers BR may control the propagation direction of the light outputtedfrom the emission areas EA-R, EA-G, and EA-B.

According to an embodiment of the inventive concept, one of theplurality of grooves crosses at least two adjacent emission areas amongthe plurality of emission areas.

In detail, when the light emitted from the emission areas EA-R, EA-G,and EA-B are transmitted to the light blocking members BR, the lightblocking members BR may absorb the transmitted light. The light blockingmembers BR may be formed of a resin having a black color to absorb thelight transmitted from the emission areas EA-R, EA-G, and EA-B. However,the technical ideas of the inventive concept are not limited thereto.For example, the blocking members BR may be formed of various materialshaving various colors that are capable of absorbing the light.

That is, a portion of the light outputted from the emission areas EA-R,EA-G, and EA-B may be absorbed by the light blocking members BR, and theother portion of the light may be outputted to the outside of thedisplay panel DP. That is, light of the light outputted from theemission areas EA-R, EA-G, and EA-B, which passes between the lightblocking members BR, may be outputted to the outside through the displaysurface.

Thus, the propagation direction of the light outputted through thedisplay surface may be controlled based on the shape of each of thegrooves defined in the bottom surface DS.

For example, the display device may be mounted in a vehicle. In thiscase, the display device may be disposed inside the vehicle so that thedisplay surface is seen by the user. In case of the existing displaydevice, the light outputted from the emission areas EA-R, EA-G, and EA-Bmay be outputted in various directions through the display surface andthus be seen or reflected on a windshield of the vehicle.

According to an embodiment of the inventive concept, the light outputtedfrom the emission areas EA-R, EA-G, and EA-B may be outputted throughthe display surface in a predetermined direction by the light blockingmembers BR. As a result, it may prevent an image from being seen on thewindshield of the vehicle.

FIG. 4 is a cross-sectional view taken along line I-I′ of FIG. 3A. FIGS.5A and 5B are enlarged views of an area AA of FIG. 4.

Referring to FIG. 4, the first substrate 100 may include a first baselayer 101, a circuit layer 102, a light emitting layer 103, and a coverlayer 104. As shown, a display area DA and a non-display area NDA aredefined on the first substrate 100. The “display area” DA, as usedherein, refers not just to specific portions of the first substrate 100but also an area overlapping the display area DA of the first substrate100. Likewise, the “nondisplay area” NDA, as used herein, refers notjust to specific portions of the first substrate 100 but also an areaoverlapping the nondisplay area NDA of the first substrate 100.

The first base layer 101 may have a rectangular shape on the plane.However, this shape may be merely an example. For example, the firstbase layer 101 may have various shapes. Also, the first base layer 101may be an insulation substrate. For example, the first base layer 101may be a glass substrate or plastic substrate.

The circuit layer 102 is disposed on the first base layer 101. Thecircuit layer 102 may include a first thin film transistor TFT1, acapacitor Cap, a second thin film transistor TFT2, and a plurality ofinsulation layers. FIG. 4 is a view illustrating an example of an areaon which the thin film transistor TFT2 of FIG. 2B is disposed.

The second thin film transistor TFT2 includes a semiconductor layer AL,a control electrode GE, and an input electrode DE and output electrodeSE, which are electrically connected to the semiconductor layer AL.

The semiconductor layer AL is disposed on the first base layer 101.Although not shown, a buffer layer may be disposed between the firstbase layer 101 and the semiconductor layer AL. The buffer layer (notshown) may be an inorganic layer and/or organic layer. The buffer layermay prevent the semiconductor layer characteristics from deteriorating.

The semiconductor layer AL may include amorphous silicon (a-Si),polysilicon (poly-Si), an oxide semiconductor, or an organicsemiconductor, but the present disclosure is not limited to a specificembodiment. Also, although not shown, the semiconductor layer AL may bedivided into a source region, a drain region, and a channel regiondefined between the source region and the drain region on the plane. Thesource region and the drain region may be regions in which impuritiesare doped. When a voltage is applied to the second thin film transistorTFT2, carriers existing in the source region and the drain region maymove through the channel region.

The first insulation layer INL1 is disposed on the semiconductor layerAL. The first insulation layer INL1 insulates layers to be formed in thefollowing process from the semiconductor layer AL. The first insulationlayer INL1 includes an organic layer and/or an inorganic layer.

The control electrode GE is disposed on the first insulation layer INL1.As described above, the control electrode GE is connected to the outputelectrode of the first thin film transistor TFT1 (see FIG. 2B).

The control electrode GE turns the second thin film transistor TFT2on/off to receive a signal. The control electrode GE is disposed tocorrespond to the channel region. The control electrode GE may include aconductive metal, a conductive semiconductor, or a conductive polymer.

Although not shown, the gate lines SL1 to SLn (see FIG. 2A) may bedisposed on the first insulation layer INL1. The gate lines SL1 to SLnmay be formed at the same process as that of the control electrode GE.

The second insulation layer INL2 is disposed on the first insulationlayer INL1. The second insulation layer INL2 electrically insulates thecontrol electrode GE and the gate lines SL1 to SLn from othercomponents.

An input electrode DE and an output electrode SE are disposed to bespaced apart from each other on the second insulation layer INL2. Theinput electrode DE and the output electrode SE may be connected to thesemiconductor layer A1 through first and second contact hole CH1 andCH2, which respectively pass through the first and second insulationlayer INL1 and INL2.

Although not shown, the data lines DL1 to DLm (see FIG. 2A) may bedisposed on the second insulation layer INL2. The data lines DL1 to DLmmay be formed in the same process as those of the input electrode DE andthe output electrode SE at the same time.

A third insulation layer INL3 is disposed on the second insulation layerINL2. The third insulation layer INL3 electrically insulates the inputelectrode DE, the output electrode SE, and the data lines DL1 to DLmfrom other components.

The light emitting layer 103 may be disposed on the circuit layer 102and include a first electrode ED1, an organic layer EL, and a secondelectrode ED2.

The first electrode ED1 may be disposed on the third insulation layerINL3 to overlap the emission area EA. The first electrode ED1 may be apixel electrode or an anode electrode. The first electrode ED1 may beformed of a material having a high work function so that holes areeasily injected. Also, the first electrode ED1 may be formed of aconductive material. The first electrode ED1 may be a reflectiveelectrode, a transmissive electrode, or a transflective electrode. Forexample, the first electrode ED1 may be provided as a single layer or amulti layer.

A pixel defining layer PDL may be disposed on the third insulation layerINL3, and the pixel defining layer PDL may overlap the non-emission areaNEA. For example, the pixel defining layer PDL may be an insulationlayer. An opening OP may be defined in the pixel defining layer PDL. Theopening OP of the pixel defining layer PDL exposes the first electrodeED1 overlapping the emission area EA. Openings OP-R, OP-G, and OP-B ofFIG. 3B may correspond to the opening OP of the pixel defining layerPDL.

The organic layer EL is disposed on the first electrode ED1. The organiclayer EL includes light emitting patterns, a hole transport region FL1(or a hole control layer), and an electron transport region FL2 (or anelectron control layer). One light emitting pattern EML is illustratedin FIG. 4.

Each of the light emitting patterns EML is disposed on the emission areaEA. The light emitting pattern EML receives an electrical signal togenerate light.

The light emitting pattern EML may be formed of at least one material ofmaterials that emit light having red, green, and blue colors and includefluorescent material or a phosphorescent material. Also, the lightemitting pattern EML may include a host material and a dopant material.The host and the dopant may include a host and dopant, which are wellknown, respectively.

The hole transport region FL1 may be a region via which the holesinjected from the first electrode ED1 reach the light emitting patternEML. The hole transport region FL1 may include at least one of a holeinjection layer, a hole transport layer, or a single layer having a holeinjection function and a hole transport function.

The hole transport region FL1 may be formed of at least one of the holeinjection material or the hole transport material. Each of the holeinjection material and the hole transporting material may be awell-known material.

The hole transport region FL1 may further include a hole stop layer.When the hole transport region FL1 includes the hole stop layer, thehole transport region FL1 may include a hole stop material that is wellknown.

The hole transport region FL1 may further include a charge generatingmaterial. The charge generating material may be uniformly dispersedwithin the hole transport region FL1 to form one single region ornon-uniformly dispersed to divide the hole transport region FL1 into aplurality of regions.

The electron transport region FL2 is defined between the light emittingpattern EML and the second electrode ED2. The electron transport regionFL2 may be a region via which the electrons injected from the secondelectrode ED2 reach the light emitting pattern EML.

The electron transport region FL2 may include at least one of a holestop layer, an electron transport layer, or an electron injection layer,but is not limited thereto. For example, the electron transport regionFL2 may have a structure of the electron transport layer/the electroninjection layer or the hole stop layer/the electron transport layer/theelectron injection layer, which are successively laminated from thelight emitting pattern EML. For example, the electron transport regionFL2 may have a single layer structure in which at least two layers ofthe above-described layers are combined, but is not limited thereto.

The electron transport region FL2 may include at least one of anelectron transport material or an electron injection material. Each ofthe electron injection material and the electron transporting materialmay be a well-known material.

The second electrode ED2 is disposed on the organic layer EL to face thefirst electrode ED1. The second electrode ED2 receives a second powersource voltage ELVSS. When the first electrode ED1 is an anodeelectrode, the second electrode ED2 may be a cathode electrode. Thus,the second electrode ED2 may be formed of a material having a low workfunction so that electrons are easily injected.

The second electrode ED2 includes a conductive material. The conductivematerial may be a metal, an alloy, an electrical conductive compound,and a mixture thereof. The second electrode ED2 may include at least oneof a reflective material or a transmissive material. Also, the secondelectrode ED2 may be a single layer or a multi layer. The multi layermay include at least one of a layer formed of the reflective material ora layer formed of the transmissive material.

The second electrode ED2 may be a reflective electrode, a transflectiveelectrode, or a transmissive electrode. The second electrode ED2 is notlimited to a specific embodiment. For example, the second electrode ED2may be formed of various materials according to the structure of theorganic light emitting device OLED.

The second electrode ED2 overlaps the emission area EA and thenon-emission area NEA. As a result, the second electrode ED2 overlapseach of the first electrode ED1 and the pixel defining layer PDL. Forexample, the second electrode ED2 may cover an entire surface of thedisplay area DA.

The second electrode ED2 is electrically connected to a power line VL toreceive the second power source voltage ELVSS. A portion of the secondelectrode ED2 extends to the non-display area NDA and is directlyconnected to the power line VL.

However, the above-described structure may be merely an example, andthus, the connection between the second electrode ED2 and the power lineVL may be variously deformed. For example, although not shown, thesecond electrode ED2 may be electrically connected to the power line VLthrough a separate contact electrode.

The cover layer 104 is disposed on the light emitting layer 103. Thecover layer 104 is disposed on the second electrode ED2 to insulate thesecond electrode ED2 from other components disposed on the secondelectrode ED2. Also, the cover layer 104 prevents moisture and oxygenfrom being permeated into the organic light emitting device OLED.

The cover layer 104 may have non-conductivity. The cover layer 104 maybe provided as at least one layer. The cover layer 104 includes at leastone of an inorganic layer or an organic layer.

The cover layer 104 overlaps the emission area EA and the non-emissionarea NEA. The cover layer 104 may have the same shape as the secondelectrode ED2 and cover an entire surface of the second electrode ED2.

The second substrate 200 includes a second base layer 201 and aprotection layer 202 disposed on the second base layer 201. The secondbase layer 201 may be a transparent insulation substrate. For example,the second base layer 201 may be a glass substrate or plastic substrate.Also, although not shown, when the display device includes the touchsensing unit, the second substrate 200 may be provided as anencapsulation substrate.

Also, as illustrated in FIG. 1, the second base layer 201 may expose atleast a portion of the first base layer 101. The data driving unit DC(see FIG. 2A) and/or the gate driving unit GC (see FIG. 2A) may bedisposed on the exposed area of the second base layer 101. However, theembodiment of the inventive concept is not limited to the shape of thesecond base layer 201. For example, the second base layer 201 may havethe same shape as the first base layer 101.

Referring to FIGS. 5A and 5B, the protection layer 200 disposed on thesecond substrate 200 is omitted. That is, the second substrate 200 maybe substantially the same as the second base layer 201.

In detail, the second substrate 200 may include a top surface US and abottom surface DS. The top surface US may face the bottom surface DS inthe third direction DR3, and the bottom surface DS may face the firstsubstrate 100 in the third direction DR3.

According to an embodiment of the inventive concept, a plurality ofgrooves Ho arranged in the first direction DR1 and extending in thethird direction DR3 may be defined in the bottom surface DS. Each of thegrooves Ho may have a width having a first length d1 a in the firstdirection DR1. Each of the grooves Ho may have a thickness having asecond length d2 a in the third direction DR3. Also, a distance betweenthe grooves Ho may have a third length d3 a in the first direction DR1.

According to an embodiment of the inventive concept, the first length dla may be about 5 micro meters to about 20 micro meters, the secondlength d2 a may be about 100 micro meters to about 500 micro meters, andthe third length d3 a may be about 30 micro meters to about 150 micrometers. However, the technical ideas of the inventive concept are notlimited thereto. For example, the grooves Ho defined in the bottomsurface DS may be variously defined according to the positions of thecomponent of the display device DD.

Also, an inner side surface INS defining the grooves Ho includes a firstside surface INS1 and a second side surface INS2, which interface eachother in the first direction DR1. In this case, the first side surfaceINS1 and the second side surface INS2 may be parallel to each other inthe third direction DR3. Also, the inner side surface INS may include abottom surface INS3 connecting the first side surface INS1 to the secondside surface INS2.

According to the descriptions of the inventive concept, although theinner side surface INS includes the three inner side surfaces, thetechnical ideas of the inventive concept are not limited thereto. Forexample, the inner side surface INS may include at least two or moreinner side surfaces.

The light blocking member BR may be disposed on each of the grooves Ho.That is, the light blocking member BR may be disposed on the inner sidesurface INS. In the particular case that is depicted, the grooves Ho maybe filled with the light blocking member BR.

Referring to FIG. 4, the protection layer 202 may be disposed on thebottom surface DS to cover the grooves Ho. The protection layer 202 mayprevent the light blocking member BR from leaking from the grooves Ho.For example, the protection layer 202 may be provided as an organiclayer coating layer or a film.

The sealing member SB may overlap the non-display area NDA and bedisposed between the first substrate 100 and the second substrate 200.The sealing member SB may couple the first substrate 100 to the secondsubstrate 200. Here, the sealing member SB may be a sealing material.Also, although not shown, a predetermined space between the first andsecond substrates 100 and 200 may be filled with a filling material.

FIG. 6 is a partial cross-sectional view of the display panel in which adirection in which light outputted from an emission area of FIG. 4travels or propagates is illustrated.

Referring to FIG. 6, light outputted from the light emitting pattern EMLdisposed on the light emitting area EA may be outputted along the thirddirection DR3. Hereinafter, the light outputted from the light emittingpattern EML may be defined as output light. The output light may not beoutputted in only a direction parallel to the third direction DR3, butbe outputted in various directions.

Also, hereinafter, light transmitted from the light emitting pattern EMLto the light blocking members BR may be defined as first light L1. Here,the first light L1 may represent light outputted from the light emittingpattern EML at a predetermined angle from the third direction DR3 to thefirst direction DR1. Also, light passing between the light blockingmembers BR from the light emitting pattern EML and then transmitted tothe outside may be defined as second light L2. The second light L2 mayrepresent light outputted from the light emitting pattern EML at apredetermined angle from the third direction DR3 to the first directionDR1.

As described above, the light blocking members BR may be arranged at apredetermined distance in the first direction DR1. When the first lightL1 is outputted from the light emitting pattern EML, the first light L1may be transmitted to the light blocking members BR. In this case, thefirst light L1 transmitted to the light blocking members BR may beabsorbed by the light blocking members BR. That is, the first light L1may be blocked by the light blocking members BR. As a result, the firstlight L1 may not be transmitted to the outside through the displaysurface.

On the other hand, when the second light L2 is outputted from the lightemitting pattern EML, the second light L2 may be transmitted between thelight blocking members BR. That is, the second light L2 may betransmitted to the outside through the display surface.

As described above, the direction in which the light outputted throughthe display surface of the display device DD travels may be controlledand made uniform by the light blocking members BR. That is, an imagedisplayed through the display surface may not be seen from adirection/angle which does not face the display surface.

FIGS. 7A and 7B are cross-sectional views taken along line I-I′ of FIG.3A according to another embodiment of the inventive concept.

A display panel DPa of FIG. 7A and a display panel DPb of FIG. 7B may besubstantially the same as the display panel DP of FIG. 4 except for onlyconstituents of a second base layer 201. Thus, descriptions with respectto other constituents will be omitted.

Referring to FIG. 7A, a plurality of grooves Ho may be defined in thebottom surface DS of the second base layer 201. According to anembodiment of the inventive concept, the grooves Ho may be defined inthe bottom surface DS of the second base layer 201 to overlap thedisplay area DA. That is, grooves Ho may not overlap the non-displayarea NDA.

The light blocking member BR may be disposed on the grooves Ho.Similarly, the light blocking member BR may overlap the display area DAand do not overlap the non-display area NDA.

As described above, the display area DA may be divided into an emissionarea EA and a non-emission area NEA.

Referring to FIG. 7B, a plurality of grooves Ho may be defined in thebottom surface DS of the second base layer 201. According to anembodiment of the inventive concept, the grooves Ho defined in thebottom surface DS may not overlap the non-display area NDA and overlapthe display area DA. Particularly, the grooves Ho may overlap theemission area EA of the display area DA and do not overlap thenon-emission area NEA.

The light blocking member BR may be disposed on the grooves Ho.Similarly, the light blocking member BR may overlap the display area DAand do not overlap the non-display area NDA.

As described above, the grooves Ho may be defined in the bottom surfaceDS of the display panel in various manners.

FIG. 8 is a cross-sectional view taken along line I-I′ of FIG. 3Aaccording to another embodiment of the inventive concept. FIGS. 9A and9B are enlarged views of an area BB of FIG. 8. FIG. 10 is a partialcross-sectional view of a display panel of FIG. 8.

A display panel DP-z of FIGS. 8 to 10 may be substantially the same asthe display panel DP of FIG. 4 except for only constituents of a secondbase layer 201. Thus, descriptions with respect to other constituentswill be omitted. Referring to FIGS. 8 to 10, the protection layer 200disposed on the second substrate 200 is omitted. That is, the secondsubstrate 200 may be substantially the same as the second base layer201.

In detail, referring to FIGS. 8 to 10, the second substrate 200 mayinclude a top surface US and a bottom surface DS. The top surface US mayface the bottom surface DS in the third direction DR3, and the bottomsurface DS may face the first substrate 100 in the third direction DR3.

According to an embodiment of the inventive concept, a plurality ofgrooves Ho-z arranged in the first direction DR1 and extending to form apredetermined angle q with respect to the third direction DR3 may bedefined in the bottom surface DS. Each of the grooves Ho-z may have awidth having a first length d1 b in the first direction DR1. Each of thegrooves Ho-z may have a thickness having a second length d2 b in thethird direction DR3. Also, a distance between the grooves Ho-z may havea third length d3 b in the first direction DR1.

Also, inner side surface INSa defining the grooves Ho-z includes a firstside surface INS1 a and a second side surface INS2 a, which face eachother in the first direction DR1 and a bottom surface INS3 a connectingthe first side surface INS1 a to the second side surface INS2 a.

According to an embodiment of the inventive concept, the inner sidesurface INSa defining the grooves Ho-z may be inclined in the firstdirection DR1 at a predetermined angle q with respect to the thirddirection DR3. In detail, at least two side surfaces of the inner sidesurface INSa may be inclined at a predetermined angle q with respect tothe third direction DR3. Here, the predetermined angle q may be an angleranging from 0 degree to 45 degrees.

The predetermined angle q may change according to the structure in whichthe display device DD is disposed. For example, the predetermined angleq may be adjusted so that an image would not be seen on the windshieldof the vehicle regardless of the exact structure in which the displaydevice DD is disposed in the vehicle.

The light blocking member BR-z may be disposed on each of the groovesHo-z. That is, the light blocking member BR-z may be disposed on theinner side surface INSa. Also, as described with reference to FIGS. 7Aand 7B, the grooves Ho-z of FIGS. 8 to 10 may be defined in the bottomsurface DS of the second substrate 200 to the display area DA. That is,the grooves Ho-z may not overlap the non-display area NDA.

Also, the grooves Ho-z defined in the bottom surface DS may not overlapthe non-display area NDA and overlap the display area DA. Particularly,the grooves Ho-z may overlap the emission area EA of the display area DAand do not overlap the non-emission area NEA.

Referring to FIGS. 4 and 8, although the grooves having the same shapeare defined in the bottom surface DS of the second substrate 200, theembodiment of the inventive concept is not limited thereto. For example,although not shown, the grooves Ho-z may be defined in different shapesin the bottom surface DS according to the structure in which the displaydevice DD is disposed. For example, the grooves Ho of FIG. 4 may bedefined in one portion of the bottom surface DS, and the grooves Ho-z ofFIG. 8 may be defined in the other portion of the bottom surface DS.

Referring to FIG. 10, the light blocking member BR-z may be arranged ata predetermined distance in the first direction and filled into each ofthe grooves Ho-z.

Also, as described above, the light blocking members BR-z may absorb thefirst light L1 transmitted from the light emitting pattern EML. As aresult, the first light L1 transmitted to the light blocking member BR-zmay not be transmitted to the outside through the display surface.

On the other hand, the second light L2 outputted from the light emittingpattern EML to pass through the light blocking members BR-z may betransmitted to the outside through the display surface. In this case,the second light L2 may be travelled to a direction which is inclined ata predetermined angle from the third direction DR3 to the firstdirection DR1.

The traveling direction of the light outputted through the displaysurface of the display device DD may be uniform through theabove-described structure.

FIG. 11 is an exploded perspective view of a display device according toanother embodiment of the inventive concept. FIG. 12 is across-sectional view of a touch sensing unit according to an embodimentof the inventive concept.

A display device DD-1 of FIG. 11 may be substantially the same as thedisplay device DD of FIG. 1 except for a touch sensing unit TP, andthus, other constituents may be substantially the same. Thus,descriptions with respect to other constituents except for the touchsensing unit TP may be omitted.

Referring to FIGS. 11 and 12, the touch sensing unit TP may be disposedbetween a window member WM and a display panel DP-1.

Particularly, the touch sensing unit TP according to an embodiment ofthe inventive concept may have an on-cell structure in which the touchsensing unit TP is disposed on the display panel DP. However, a positionrelationship between the display panel DP-1 and the touch sensing unitTP is not limited thereto. For example, the touch sensing unit TP may berealized as an in-cell structure in which the touch sensing unit TP isdisposed in the display panel DP-1.

As illustrated in FIG. 12, the touch sensing unit TP includes a firstconductive layer CL1, a first touch insulation layer IL1, a secondconductive layer CL2, and a second touch insulation layer IL2.

Each of the first conductive layer CL1 and the second conductive layerCL2 may have a single-layered structure or a multi-layered structure inwhich a plurality of layers are laminated in the third directional axisDR3. The conductive layer having the multi-layered structure may includea transparent conductive layer and at least one metal layer. Theconductive layer having the multi-layered structure may include metallayers including metals different from each other. The transparentconductive layer may include indium tin oxide (ITO), indium zinc oxide(IZO), zinc oxide (ZnO), or indium tin zinc oxide (ITZO), PEDOT, a metalnano wire, and graphene. The metal layer may be formed of molybdenum,silver, titanium, copper, aluminum, and an alloy thereof.

Each of the first and second conductive layers CL1 and CL2 may include aplurality of patterns. Hereinafter, a structure in which the firstconductive layer CL1 includes first conductive patterns, and the secondconducive layer CL2 includes second conductive patterns will bedescribed. Each of the first and second conductive patterns may includetouch electrodes and touch signal lines.

Each of the first and second touch insulation layers IL1 and IL2 may beformed of inorganic or organic material. The inorganic material mayinclude silicon oxide or silicon nitride. The organic material mayinclude at least one of an acrylic-based resin, a methacrylic-basedresin, a polyisoprene-based resin, a vinyl-based resin, an epoxy-basedresin, a urethane-based resin, a cellulose-based resin, or aperylene-based resin. If the first touch insulation layer IL1 insulatesthe first and second touch insulation layers CL1 and CL2 from eachother, the embodiment of the inventive concept is not limited to theshape of the first touch insulation layer IL1. The first touchinsulation layer IL1 may be deformed in shape according to the shapes ofthe first and second conductive patterns. The first touch insulationlayer IL1 may entirely cover a second base layer 201 of a secondsubstrate 200 that will be described later in detail or include aplurality of insulation patterns.

According to the descriptions of the inventive concept, a 1-layeredcapacitive touch screen is illustrated as an example. However, the touchsensing unit TP may be driven in a self capacitance manner. Also, theembodiment of the inventive concept is not limited to the driving mannerof the touch screen for acquiring the coordinate information. That is,although not shown, the touch sensing unit TP may be provided as a2-layered capacitive touch screen.

FIGS. 13A and 13B are plan views of the touch sensing unit according toan embodiment of the inventive concept. FIG. 13C is a partial enlargedplan view of an area CC of FIG. 13B. FIG. 13D is a cross-sectional viewtaken along line II-II′ of FIG. 13C.

As described above, the touch sensing unit TP of FIGS. 13A to 13D may beprovided as the 1-layered capacitive touch screen.

Referring to FIG. 13A, the first conductive patterns may include firsttouch electrodes TE1-1 to TE1-3, first touch signal lines SL1-1 toSL1-3, second sensing parts SP2 of second touch electrodes TE2-1 toTE2-3, and second touch signal lines SL2-1 to SL2-3. The first sensingparts SP1 may be arranged in the first direction DR1, and the secondsensing parts SP2 may be arranged in the second direction DR2.

Each of the first touch electrodes TE1-1 to TE1-3 includes a pluralityof first sensing parts SP1 and a plurality of first connection partsCP1. Each of the second touch electrodes TE2-1 to TE2-3 includes aplurality of second sensing parts SP2. That is, the first sensing partsSP1, the first connection parts CP1, and the second sensing parts SP2may be disposed on the same layer.

Referring to FIG. 13B, in the second conductive patterns, secondconnection parts CP2 connect the second touch electrode TE2-1, TE2-2,and TE2-3 to each other in the first direction DR1. That is, each of thesecond connection parts CP2 plays a bridge function.

The first sensing parts SP1 overlaps the non-emission area NEA that isadjacent to the emission area EA. Each of the first sensing parts SP1and the second connection parts CP1 may be defined in a mesh having atouch opening. The mesh may have a line width of several micrometers.

Each of the first sensing parts SP1 and the first connection parts CP1may be defined in the form of a mesh having a touch opening. Each of thesecond sensing parts SP2 and the second connection parts CP2 may havethe form of a mesh having the above-described touch opening. The touchopening may have a one-to-one correspondence to the emission area EA orcorrespond to two or more emission areas EA. That is, two or moreemission areas EA may be disposed inside one touch opening.

As illustrated in FIGS. 13A and 13B, the first connection part CP1 mayinclude first vertical portions CP1-C1 and CP1-C2 disposed on the secondsubstrate 200 and first horizontal portions CP1-L connecting the firstvertical portions CP1-C1 and CP1-C2 to each other. Here, although twofirst vertical portions CP1-C1 and CP1-CP are illustrated, theembodiment of the inventive concept is not limited thereto.

The second connection parts CP2 may second horizontal portions CP2-L1and CP2-L2 disposed on a first black matrix TP-BM1 and second verticalportions CP2-C connecting the second horizontal portions CP2-L1 andCP2-L2 to each other. The first connection parts CP1 may have a meshshape, and also, the second connection parts CP2 may have a mesh shape.

The connection parts CP2 electrically connect two second sensing partsSP2, which are adjacent to each other in the first direction DR, of thesecond sensing parts SP2 through first and second through holes TP-CH1and TP-CH2 passing through the first black matrix TP-BM1.

A second black matrix TP-BM2 may be enough to overlap the secondconnection part CP2. That is, the second black matrix TP-BM2 may overlaponly a portion of the non-emission area NEA.

As illustrated in FIGS. 13A to 13D, a structure in which the firstsensing parts SP1, the first connection parts CP1, and the secondsensing parts SP2 are disposed on the same layer is described. However,the technical ideas of the inventive concept are not limited thereto.

For example, the first sensing parts SP1, the first connection partsCP1, and the second connection parts CP2 may be disposed on the samefirst layer, and the second sensing parts SP2 may be disposed on asecond layer different from the first layer. Similarly, in this case,the second connection parts CP2 may electrically connect the secondsensing parts SP2 to each other through the first and second contactholes TP-CH1 and TP-CH2.

Referring to FIG. 13D, it is seen that the touch sensing unit TP isdisposed on the display panel DP-1 of FIG. 4 according to an embodimentof the inventive concept.

FIG. 14A is an exploded perspective view of a display device accordingto another embodiment of the inventive concept. FIG. 14B is across-sectional view taken along line III-III′ of FIG. 14.

A display device DD-2 of FIGS. 14A and 14B may be substantially the sameas the display device DD of FIG. 1 except that a light blocking memberBR is disposed on a window member WM, but not disposed on the displaypanel DP-2. That is, the display device DD-2 may have substantially thesame constituent as the display device DD of FIG. 1 except for a lightblocking member BR. Thus, descriptions with respect to otherconstituents will be omitted.

Referring to FIGS. 14A and 14B, a window member WM-1 includes a baselayer 301 and a protection layer 302 disposed on the base layer 301.Also, as illustrated in FIG. 1, the window member WM-1 may furtherinclude a bezel layer BZL. The bezel layer BZL may block light providedfrom the display panel DP-2. The bezel layer BZL may be disposed on thebase layer 301 to overlap the non-display area NDA. The bezel layer BZLmay have various colors according to the product implementation.Hereinafter, the window member WM-1 may substantially represent the baselayer 301.

An adhesion layer RS may be disposed between the window member WM-1 andthe display panel DP-2. Here, the adhesion layer RS may be a resinlayer. That is, an encapsulation substrate that is defined as a secondsubstrate of the display panel DP-2 and the window member WM-1 mayadhere to each other by using the adhesion layer RS. For example, theadhesion layer RS may be cured by being irradiated by externalultraviolet rays. Here, the window member WM-1 and the encapsulationsubstrate of the display panel DP-2 may be directly coupled to eachother by the adhesion layer RS.

However, the technical ideas of the inventive concept are not limitedthereto. For example, the window member WM-1 and the encapsulationsubstrate of the display panel DP-2 may not be directly coupled to eachother by the adhesion layer RS. That is, when a touch sensing unit isdisposed above the encapsulation substrate, the window member WM-1 andthe touch sensing unit may be coupled to each other by the adhesionlayer RS.

In detail, the window member WM-1 may include a top surface and a bottomsurface. The top surface may face the bottom surface in the thirddirection DR3, and the bottom surface may face the display panel DP-2 inthe third direction DR3.

According to an embodiment of the inventive concept, a plurality ofgrooves Ho-1 arranged in the first direction DR1 and extending in thethird direction DR3 may be defined in the bottom surface of the windowmember WM-1. A light blocking member BR-1 may be filled into the groovesHo-1. A protection layer 302 may be disposed on the base layer 301 tocover the grooves Ho-1. As a result, the light blocking member BR-1 doesnot leak from the grooves Ho-1.

As illustrated in FIG. 14B, the grooves Ho-1 may be defined in thebottom surface to overlap the display area DA. However, the technicalideas of the inventive concept are not limited thereto. For example, thegrooves Ho-1 may be defined in the bottom surface DS-1 to overlap onlythe display area DA. That is, grooves Ho-1 may not overlap thenon-display area NDA.

Also, the grooves Ho-1 defined in the bottom surface DS-1 may overlap anemission area EA of the display area DA and do not overlap anon-emission area NEA.

Although not shown, the display device DD-2 may further include a touchsensing unit disposed between the window member WM-1 and the displaypanel DP-2. That is, the touch sensing unit TP of FIG. 11 may bedisposed on the display panel DP-2.

As described above, the display device according to an embodiment of theinventive concept may have a structure in which the light blockingmember BR is disposed on the window member WM or the second substrate200 of the display panel DP.

For example, in the display device according to an embodiment of theinventive concept, a substrate 100 may be provided as a lower substrate,and a second substrate 200 the light blocking member BR is disposed maybe provided as an upper substrate disposed above the lower substrate. Inthis case, the lower substrate may be a substrate including a lightemitting layer, and the upper substrate may be the encapsulationsubstrate.

For example, in the display device according to an embodiment of theinventive concept, the first substrate 100 may be provided as a lowersubstrate, and the second substrate 200 on which the light blockingmember BR is disposed may be provided as an upper substrate disposedabove the lower substrate. In this case, the lower substrate may be asubstrate including the light emitting layer, and the upper substratemay be the window member WM.

FIGS. 15A to 15E are views illustrating a method for manufacturing adisplay device according to another embodiment of the inventive concept.

According to an embodiment of the inventive concept, a substrate ST ofFIGS. 15A to 15E may be a substrate that provided in a window member anda display panel according to the inventive concept.

Referring to FIG. 15A, the substrate ST may be prepared. For example,the substrate ST may include glass, sapphire, plastic, and the like.Also, the substrate ST may include a top surface US and a bottom surfaceDS facing the top surface US.

Referring to FIG. 15B, a plurality of grooves Ho arranged in a firstdirection DR1 and extending in a third direction DR3 perpendicular tothe first direction DR1 may be formed in the bottom surface DS. Forexample, the grooves Ho may be intagliated by using laser or etchedthrough a separate pattern layer to form the bottom surface DS. A methodfor forming the groove Ho in the bottom surface DS may be performedthrough various manners in addition to the above-described manner.

Referring to FIG. 15C, a light blocking member BR may be applied to thebottom surface DS in which the grooves Ho are formed. In this case, thelight blocking member BR may be filled into the grooves Ho. According toan embodiment, the light blocking member BR may include a resin having ablack color.

Referring to FIG. 15D, since the light blocking member BR is disposed onan entire surface of the bottom surface D, the rest area of the bottomsurface DS except for the area in which the grooves Ho are defined maybe cleaned. As a result, the light blocking member BR may be filled intoonly the grooves Ho.

Referring to FIG. 15E, a protection layer CT may be disposed on thebottom surface DS. That is, the protection layer CT may prevent thelight blocking member BR filled into the grooves Ho from leaking to theoutside. For example, the protection layer CT may be disposed on thebottom surface DS as an organic layer coating layer or disposed on thebottom surface DS as a separate film type.

FIG. 16 is a view illustrating an example of the display deviceaccording to an embodiment of the inventive concept.

For example, FIG. 16 illustrates a state in which the display deviceaccording to an embodiment of the inventive concept is mounted in avehicle. Hereinafter, a structure in which a first display device DD-Qand a second display device DD-P are mounted adjacent to a driver's seatwithin the vehicle will be described.

According to an embodiment of the inventive concept, the first displaydevice DD-Q may be a flat display device. For example, the first displaydevice DD-Q may be a navigation for displaying traffic information. Thesecond display device DD-P may be a display device for displayinginformation such as news. A display surface of the first display deviceDD-Q may be disposed within the vehicle to face user's eyes. That is,the display surface of the first display device DD-Q may be a surfacethat is parallel to the second direction D2 and the third direction D3and face the user's eyes in the first direction Dl.

As described above, light may be emitted from the display surface of thefirst display device DD-Q in the first direction D1 by the lightblocking member. That is, since the light is not emitted from thedisplay surface of the first display device DD-Q in the third directionD3, an image may not be displayed on a windshield FG.

Also, the second display device DD-P may be a flexible display device.Particularly, a first area PLR having a flat display surface and asecond area FXR having a curved display surface may be defined on thesecond display device DD-P.

According to an embodiment of the inventive concept, the light blockingmember of FIG. 4 may be applied to the first area PLR, and the lightblocking member of FIG. 8 may be applied to the second area FXR.

According to the embodiment of the inventive concept, the plurality ofgrooves arranged in the first direction and extending in the thirddirection perpendicular to the first direction may be defined in thedisplay panel or the window member. The light blocking member blockinglight may be disposed in each of the plurality of grooves.

That is, the light blocking member may control the propagation directionof the light outputted from the display surface. Therefore, the imageprovided from the display device for the vehicle may not be seen orreflected on the windshield of the vehicle.

Hereinabove, the embodiment is disclosed in the drawings and thespecification. While specific terms were used, they were not used tolimit the meaning or the scope of the inventive concept described inclaims, but merely used to explain the inventive concept. Accordingly, aperson having ordinary skill in the art will understand from the abovethat various modifications and other equivalent embodiments are alsopossible. Hence, the real protective scope of the present inventionshall be determined by the technical scope of the accompanying claims.

What is claimed is:
 1. A display device comprising: a display panelcomprising a base layer and a light emitting layer disposed on the baselayer; a window disposed on the light emitting layer and comprising atop surface and a bottom surface facing the light emitting layer, thewindow including a plurality of grooves recessed from the bottomsurface, the plurality of grooves being disposed between the lightemitting layer and the window; and a plurality of light blocking layersdisposed in the plurality of grooves, respectively.
 2. The displaydevice of claim 1, wherein the window comprises: a base layer on whichthe top surface and the bottom surface are defined; and a bezel layeroverlapping a non-display area and disposed on the bottom surface. 3.The display device of claim 1, wherein the plurality of grooves aredisposed not to overlap the non-display area.
 4. The display device ofclaim 3, wherein the display area includes a plurality of emission areasand a plurality of non-emission areas that are disposed adjacent to theplurality of emission areas, and wherein the plurality of grooves aredisposed to overlap the plurality of emission areas and not to overlapthe plurality of non-emission areas.
 5. The display device of claim 1,further comprising a touch sensor disposed between the display panel andthe window, wherein the window comprises a protection layer disposed onthe bottom surface to cover the plurality of grooves.
 6. The displaydevice of claim 1, wherein the display panel includes a display area anda non-display area adjacent to the display area, wherein the pluralityof grooves overlaps the display area.
 7. The display device of claim 1,wherein the top surface of the window is a display surface fordisplaying an image.
 8. A display device comprising: a display panelcomprising a display area; a window comprising a top surface and abottom surface in which a plurality of grooves arranged in a firstdirection are defined, the window being disposed on a light emittingsurface of the display panel to allow the bottom surface to face thelight emitting surface of the display panel; and a plurality of lightblocking layers disposed in the plurality of grooves, respectively,wherein the plurality of grooves are disposed between the light emittingsurface of the display panel and the window, and overlap the displayarea.